Rockwell Automation 1788-CNCR ControlNet Daughtercard Installation Instructions - Manual (Page 14)

14 ControlNet Daughtercard
Publication 1788-IN002C-EN-P - April 2004
Interpreting the Status Indicators
Status indicators provide information about the card and the network when you are
connected via the BNC connectors. Tables 1 and 2 on the following pages outline the
possible states, explain what each state means to you, and indicate what action you should
take, if any, to correct that state.
Definition of terms:
• steady - indicator is on continuously in the defined state.
• alternating - the two indicators alternate between the two defined states at the same
time (applies to both indicators when viewed together); the two indicators are always in
opposite states, out of phase.
• flashing - the indicator alternates between the two defined states (applies to each
indicator viewed independent of the other); if both indicators are flashing, they flash
together, in phase.
IMPORTANT
Keep in mind that the Module Status indictor reflects the module state,
e.g., self-test, firmware update, normal operation but no connection
established, etc. The network status LEDs, A and B, reflect network
status. Remember that the host is able to engage in local messaging with
the card although it is detached from the network. Therefore, the Module
Status LED is flashing green if the host has successfully started the card.
Note, however, that until the host removes reset, all LEDs on the
daughtercard will remain off.
When you view the indicators, always view the Module Status indicator
first to determine the state of the daughtercard. This information may
help you to interpret the network status indicators. As a general practice,
view all three status indicators (Module Status, I/O Status, and Network
Status) together to gain a full understanding of the daughtercard’s status.